Q1W5 - PAMPHLET - BASILIO

Mantle

Convection





























Lois Jane M.
Basilio
10-Hawking

CONVECTION
CURRENTS
A convection
current is a
process that
involves the
movement of
energy from one
place to another.
It is also call the
convection heat
transfer.



WHAT CAUSES
CONVECTION
CURRENTS?

Convection currents occur
when a heated fluid expands,
becoming less dense, and
rises. The fluid then cools and
contracts, becoming more
dense, and sinks. Convection
occurs when heat cannot
efficiently be transferred
through radiation or thermal
conduction. In astronomy,
convection currents occur in
the mantle of the Earth, and
presumably some other
planets, and the convection
zone of the sun.

WHAT CAUSES
CONVECTION
CURRENTS IN EARTH'S
MANTLE?
Heat in the mantle comes
from the Earth's molten outer
core. Decay of radioactive
elements and, in the upper
mantle, friction from
descending tectonic plates.
The temperature difference
between the upper and lower
boundaries of the mantle
requires heat transfer to
occur.

MANTLE


CONVECTION
CURRENTS

































Mantle

Convection